10pcs 6004-2rs1 rubber sealed deep-groove ball bearings 20x42x12mm

these bearings are made of steel for low noise and long service life. they are rubber sealed to avoid contaminants entering and save lubricant. bearings have a 20mm inner diameter, a 42mm outer diameter, and a 12mm thickness. these are great for small hobby 20mm shaft/rod projects. there comes total 10 pieces miniature bearings which you may use for many different projects..syi